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E3 ubiquitin ligase binding linker

" in MedChemExpress (MCE) Product Catalog:

By Targets:	E1/E2/E3 Enzyme (1) Ligands for E3 Ligase (1) Ligands for Target Protein for PROTAC (1) Target Protein Ligand-Linker Conjugates (1) Androgen Receptor (1) CDK (1) Epigenetic Reader Domain (1) Estrogen Receptor/ERR (2) Histone Acetyltransferase (1) MAGL (1) MDM-2/p53 (1) PROTACs (7)
By Research Areas:	Cancer (10)
Click Chemistry:	PROTAC Synthesis (1)

Inhibitors & Agonists

Screening Libraries

Click Chemistry

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Cat. No.	Product Name	Target	Research Areas	Chemical Structure

HY-123937

THAL-SNS-032 5+ Cited Publications	PROTACs CDK	Cancer
THAL-SNS-032 is a selective CDK9 degrader PROTAC consisting of a *CDK*-binding SNS-032 ligand linked to a thalidomide derivative that binds the E3 ubiquitin ligase Cereblon (CRBN) .

HY-112098

PROTAC ERα Degrader-1 1 Publications Verification	PROTACs Estrogen Receptor/ERR	Cancer
PROTAC ERα Degrader-1 comprises an ubiquitin E3 ligase binding group, a linker and a protein binding group. PROTAC ERα Degrader-1 extracts from patent WO2017201449A1, compound P1. PROTAC ERα Degrader-1 is an estrogen receptor-alpha (ERα) degrader.

HY-128845

PROTAC CRBN Degrader-1	PROTACs E1/E2/E3 Enzyme	Cancer
PROTAC CRBN Degrader-1 (Compound 14a) is a VHL-CRBN heterodimerization PROTAC degrader that achieves a selective degradation of CRBN by binding two E3 ubiquitin ligases (VHL and CRBN) to each other . (Blue: VHL ligand (S,R,S)-AHPC (HY-125845); Pink: CRBN ligand Pomalidomide-C2-NH2 (HY-128846); Black: Linker (HY-128847))

HY-114402

ARD-69	PROTACs Androgen Receptor	Cancer
ARD-69 is a PROTAC degrader based on the E3 ubiquitin ligase VHL and targeting the androgen receptor, which can induce androgen receptor (AR) protein degradation in AR-positive prostate cancer cells. ARD-69 inhibits AR-regulated gene expression, binds to the AR ligand binding domain at one end and binds to VHL at the other end, prompting AR to be recruited to the E3 ubiquitin ligase complex, triggering proteasome degradation, thereby inhibiting AR signaling pathways and downstream gene expression (such as PSA, TMPRSS2). ARD-69 can be used to study the treatment of castration-resistant prostate cancer (mCRPC) . ARD-69 is composed of a target protein ligand (pink part) AR antagonist 14 (HY-172624), a PROTAC linker (black part) tert-Butyl 4-ethynyl-[1,4'-bipiperidine]-1'-carboxylate (HY-W442074), and a VHL-type E3 ubiquitinase ligand (blue part) VH 101, acid (HY-47070); among them, the VHL ligand and the linker can form a conjugate VH 101-amide-piperidine-Pip-alkyne (HY-172625).

HY-158684

YX-02-030	PROTACs MDM-2/p53	Cancer
YX-02-030M is a PROTAC MDM2 degrader. YX-02-030M inhibits MDM2-p53 binding and VHL-HIF1α binding with IC₅₀s of 63 nM and 1.35 μM respectively. YX-02-030M binds MDM2 and recruits the VHL E3 ubiquitin ligase to initiate MDM2 degradation, and effectively kills p53 mutant or deleted Triple-negative breast cancers (TNBC) cells. (Blue: VHL ligand; Black: linker; Pink: MDM2 inhibitor) .

HY-153424

PROTAC SMARCA2 degrader-1	Target Protein Ligand-Linker Conjugates	Cancer
PROTAC SMARCA2 degrader-1 (compound ex7) is a BRM2 (SMARCA2) degrader (DC₅₀<0.1 μM). PROTAC SMARCA2 degrader-1 is also an E3 ubiquitin ligase binding linker useful in research of cancers. PROTAC SMARCA2 degrader-1 is a *target protein ligand-linker* conjugate** .

HY-173369

PROTAC MAGL degrader-1	MAGL Ligands for E3 Ligase	Cancer
PROTAC MAGL degrader-1 is an orally active PROTAC agent that simultaneously targets monoacylglycerol lipase (MAGL) and E3 ubiquitin ligase MDM2. PROTAC MAGL degrader-1 degrades MAGL and inhibits the binding of MDM2 to p53. PROTAC MAGL degrader-1 can partially penetrate the blood-brain barrier (BBB). PROTAC MAGL degrader-1 induces glioblastoma stem cells (GSCs) apoptosis. (E3 ligase ligand: HY-128837; target protein ligand + linker: HY-173370; target protein inhibitor: HY-15249) .

HY-145071

PROTAC ERα Y537S degrader-1	PROTACs Estrogen Receptor/ERR	Cancer
PROTAC ERα Y537S degrader-1 comprises a ubiquitin E3 ligase binding group, a linker and a protein binding group. PROTAC ERα Y537S degrader-1 extracts from patent WO2021143822, example 12. PROTAC ERα Y537S degrader-1 is an estrogen receptor-alpha (ERα) Y537S degrader .

HY-161960

EP300/CBP ligand 2	Ligands for Target Protein for PROTAC Epigenetic Reader Domain	Cancer
EP300/CBP ligand 2 (compound S19) is a ligand targeting the bromodomain of CREB binding protein (CBP) and E1A-associated protein (EP300). EP300/CBP ligand 2 can be used as a target protein ligand in the PROTAC structure, and can be coupled to the E3 ubiquitin ligase ligand through the PTOTAC Linker to synthesize PROTAC molecules with degradation effects. For example, EP300/CBP ligand 2 can be coupled with the conjugate (E3 ubiquitin enzyme ligand + Linker) Thalidomide-NH-C10-Boc (HY-161961) to produce the PROTAC molecule dCE-2 (HY-161958) .

HY-161958

dCE-2	PROTACs Histone Acetyltransferase	Cancer
dCE-2 (compound 5) is a PROTAC targeting CREB binding protein (CBP) and E1A-associated protein (EP300), which was developed based on the crystal structure of bromodomain (BRD) inhibitors. dCE-2 is composed of E3 ubiquitin ligase ligand Thalidomide-4-OH (HY-103596) (blue part), PROTAC Linker tert-Butyl 11-aminoundecanoate (HY-130715) (black part) and PROTAC target protein ligand EP300/CBP ligand 2 (HY-161960) (red part), of which the target protein ligand activity control is EP300/CBP ligand 1 (HY-161959), and the conjugate of E3 ubiquitin ligase ligand + Linker is Thalidomide-NH-C10-Boc (HY-161961) ^{[1] ^.}

Cat. No.	Product Name

HY-L128

E3 Ligase Ligand Library	87 compounds
Proteolysis-targeting chimera (PROTAC) has been developed to be a useful technology for targeted protein degradation. PROTACs consist of a ligand for E3 ligase (E3 ligase binder), a linker and a ligand (mostly small-molecule inhibitor) for protein of interest（target binder）. Upon binding to the target protein, the PROTACs can recruit E3 for target protein ubiquitination, which is subjected to proteasome-mediated degradation. Although there are more than 600 E3 ubiquitin ligases, only several with small molecule ligands have been used for designing PROTACs, including Skp1-Cullin-F box complex containing Hrt1 (SCF), Von Hippel-Lindau tumor suppressor (VHL), Cereblon (CRBN), inhibitor of apoptosis proteins (IAPs), and mouse double minute 2 homolog (MDM2). MCE carefully prepared a unique collection of 87 ligands for E3 ligase, which have been reported to be used in PROTAC design. MCE E3 ligase ligand library is a useful tool for PROTAC development.

E3 Ligase Ligand Library

87 compounds

Proteolysis-targeting chimera (PROTAC) has been developed to be a useful technology for targeted protein degradation. PROTACs consist of a ligand for E3 ligase (E3 ligase binder), a linker and a ligand (mostly small-molecule inhibitor) for protein of interest（target binder）. Upon binding to the target protein, the PROTACs can recruit E3 for target protein ubiquitination, which is subjected to proteasome-mediated degradation.

Although there are more than 600 E3 ubiquitin ligases, only several with small molecule ligands have been used for designing PROTACs, including Skp1-Cullin-F box complex containing Hrt1 (SCF), Von Hippel-Lindau tumor suppressor (VHL), Cereblon (CRBN), inhibitor of apoptosis proteins (IAPs), and mouse double minute 2 homolog (MDM2).

MCE carefully prepared a unique collection of 87 ligands for E3 ligase, which have been reported to be used in PROTAC design. MCE E3 ligase ligand library is a useful tool for PROTAC development.

HY-L918

Molecular Glue-like Compound Library	320 compounds
Targeted Protein Degradation (TPD) is a novel and promising approach to drug development. It shows great potential for targeting proteins traditionally considered "undruggable" due to the lack of enzymatic function and absence of binding sites by tagging them for degradation or recruiting natural degradation mechanisms. Molecular glues are a type of small-molecule degraders that primarily induce novel interactions between E3 ubiquitin ligases and target proteins, forming ternary complexes that lead to protein ubiquitination and subsequent proteasomal degradation. Compared with PROTACs, molecular glues generally have lower molecular weights, higher cell permeability, and better drug-like properties. Additionally, the design of molecular glues is relatively simple, without the requirements for complex linkers and ligand optimization. As a result, molecular glues have gradually emerged as a promising therapeutic approach for various diseases. Multiple types of molecular glues have been reported previously. Analysis of co-crystal complex structures reveals that CRBN-related molecular glues are more versatile. Therefore, MCE researchers select active molecules related to these targets as probes for artificial intelligence (AI) screening.Subsequently, molecular docking technology was used to verify whether the screened molecules retained the key pharmacophore features. Ultimately, we obtained 320 molecular glue analogs, and these compounds serve as powerful tools for the research of molecular glues.

Molecular Glue-like Compound Library

320 compounds

Targeted Protein Degradation (TPD) is a novel and promising approach to drug development. It shows great potential for targeting proteins traditionally considered "undruggable" due to the lack of enzymatic function and absence of binding sites by tagging them for degradation or recruiting natural degradation mechanisms.

Molecular glues are a type of small-molecule degraders that primarily induce novel interactions between E3 ubiquitin ligases and target proteins, forming ternary complexes that lead to protein ubiquitination and subsequent proteasomal degradation. Compared with PROTACs, molecular glues generally have lower molecular weights, higher cell permeability, and better drug-like properties. Additionally, the design of molecular glues is relatively simple, without the requirements for complex linkers and ligand optimization. As a result, molecular glues have gradually emerged as a promising therapeutic approach for various diseases.

Multiple types of molecular glues have been reported previously. Analysis of co-crystal complex structures reveals that CRBN-related molecular glues are more versatile. Therefore, MCE researchers select active molecules related to these targets as probes for artificial intelligence (AI) screening.Subsequently, molecular docking technology was used to verify whether the screened molecules retained the key pharmacophore features. Ultimately, we obtained 320 molecular glue analogs, and these compounds serve as powerful tools for the research of molecular glues.

Cat. No.	Product Name		Classification

HY-114402

ARD-69		PROTAC Synthesis
ARD-69 is a PROTAC degrader based on the E3 ubiquitin ligase VHL and targeting the androgen receptor, which can induce androgen receptor (AR) protein degradation in AR-positive prostate cancer cells. ARD-69 inhibits AR-regulated gene expression, binds to the AR ligand binding domain at one end and binds to VHL at the other end, prompting AR to be recruited to the E3 ubiquitin ligase complex, triggering proteasome degradation, thereby inhibiting AR signaling pathways and downstream gene expression (such as PSA, TMPRSS2). ARD-69 can be used to study the treatment of castration-resistant prostate cancer (mCRPC) . ARD-69 is composed of a target protein ligand (pink part) AR antagonist 14 (HY-172624), a PROTAC linker (black part) tert-Butyl 4-ethynyl-[1,4'-bipiperidine]-1'-carboxylate (HY-W442074), and a VHL-type E3 ubiquitinase ligand (blue part) VH 101, acid (HY-47070); among them, the VHL ligand and the linker can form a conjugate VH 101-amide-piperidine-Pip-alkyne (HY-172625).

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